I ask danyy with smc and he pointed me in the direction of the 6000mah sportmax 28c. I will be using this for racing stock and 10.5.

my other choices are the smc 5200mah 24c and the thunder power 5000mah 40c.

What one is better? I really dont wanna spend 125 for a battery and thats why smc is looking good.

how many do you think i need? I was thinking 2 so I can rotate them and get more practice and stuff.